Drinking water in 47057
For this postcode the responsible water supplier publishes several supply zones. Which of them serves an individual address is not published — below are the values of the zone with the most documented parameters, the remaining 1 underneath.
How to read the share of the parametric value
12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.
< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.
Several samples per year: for chemical parameters the mean value is given, for microbiological ones the highest measured value. There the parametric value is zero — a single finding would disappear in the average, and it is precisely that finding which is the information. Which reference applies is stated in the last column of the table.
Versorgungsbereich 1 - südlich der Ruhr einschl. Rheinhausen
Stadtwerke DuisburgWater hardness
17.9 °dH
Hardness range hart
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 21 ng/l | 0.1 µg/l | 21 % | Mean · Q1 2026 |
| Nitrate | 18 mg/l | 50 mg/l | 36 % | Mean · Q1 2026 |
| Lead | n.n. µg/l not detectable | 10 µg/l | — | Mean · Q1 2026 |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Mean · Q1 2026 |
| Sulphate | 69 mg/l | 250 mg/l | 28 % | Mean · Q1 2026 |
| Sodium | 22 mg/l | 200 mg/l | 11 % | Mean · Q1 2026 |
Show all recorded parameters (64 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Mean · Q1 2026 |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Mean · Q1 2026 |
Chemical parameters (28)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | n.n. µg/l not detectable | 3 µg/l | — | Mean · Q1 2026 |
| Acrylamide | n.n. µg/l not detectable | 0.1 µg/l | — | Mean · Q1 2026 |
| Antimony | n.n. µg/l not detectable | 5 µg/l | — | Mean · Q1 2026 |
| Arsenic | n.n. µg/l not detectable | 10 µg/l | — | Mean · Q1 2026 |
| Benzene | n.n. µg/l not detectable | 1 µg/l | — | Mean · Q1 2026 |
| Benzo(a)pyrene | n.n. µg/l not detectable | 10 ng/l | — | Mean · Q1 2026 |
| Boron | 32 µg/l | 1 mg/l | 3 % | Mean · Q1 2026 |
| Bromate | 1,2 µg/l | 10 µg/l | 12 % | Mean · Q1 2026 |
| Cadmium | n.n. µg/l not detectable | 3 µg/l | — | Mean · Q1 2026 |
| Chlorate | n.n. µg/l not detectable | 70 µg/l | — | Mean · Q1 2026 |
| Chromium | n.n. µg/l not detectable | 25 µg/l | — | Mean · Q1 2026 |
| Copper | n.n. mg/l not detectable | 2 mg/l | — | Mean · Q1 2026 |
| Cyanide | n.n. µg/l not detectable | 50 µg/l | — | Mean · Q1 2026 |
| Epichlorohydrin | n.n. µg/l not detectable | 0.1 µg/l | — | Mean · Q1 2026 |
| Fluoride | n.n. mg/l not detectable | 1.5 mg/l | — | Mean · Q1 2026 |
| Haloacetic acids (HAA) | n.n. µg/l not detectable | 60 µg/l | — | Mean · Q1 2026 |
| Lead | n.n. µg/l not detectable | 10 µg/l | — | Mean · Q1 2026 |
| Mercury | n.n. µg/l not detectable | 1 µg/l | — | Mean · Q1 2026 |
| Nickel | n.n. µg/l not detectable | 20 µg/l | — | Mean · Q1 2026 |
| Nitrate | 18 mg/l | 50 mg/l | 36 % | Mean · Q1 2026 |
| Nitrite | n.n. mg/l not detectable | 0.5 mg/l | — | Mean · Q1 2026 |
| Pesticides — Total | n.n. µg/l not detectable | 0.5 µg/l | — | Mean · Q1 2026 |
| Polycyclic aromatic hydrocarbons | n.n µg/l not detectable | 0.1 µg/l | — | Mean · Q1 2026 |
| Selenium | n.n. µg/l not detectable | 10 µg/l | — | Mean · Q1 2026 |
| Tetrachloroethene and Trichloroethene (sum) | n.n µg/l not detectable | 10 µg/l | — | Mean · Q1 2026 |
| Trihalomethanes — Total | 5,8 µg/l | 50 µg/l | 12 % | Mean · Q1 2026 |
| Uranium | 0,5 µg/l | 10 µg/l | 5 % | Mean · Q1 2026 |
| Vinyl chloride | n.n. µg/l not detectable | 0.5 µg/l | — | Mean · Q1 2026 |
PFAS (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of 4 PFAS | 0,5 ng/l | — | — | Mean · Q1 2026 |
| Sum of PFAS | 21 ng/l | 0.1 µg/l | 21 % | Mean · Q1 2026 |
Indicator parameters (20)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 14 µg/l | 0.2 mg/l | 7 % | Mean · Q1 2026 |
| Ammonium | n.n. µg/l not detectable | 0.5 mg/l | — | Mean · Q1 2026 |
| Calcite dissolution capacity | eingehalten mg/l | 5 mg/l CaCO3 | — | Mean · Q1 2026 |
| Chloride | 45 mg/l | 250 mg/l | 18 % | Mean · Q1 2026 |
| Clostridium perfringens (including spores) | 0 KBE/100ml | 0/100 ml | — | Mean · Q1 2026 |
| Coliform bacteria | 0 KBE/100ml | 0/100 ml | — | Mean · Q1 2026 |
| Colony count 22 °C | 2 KBE/ml | ohne anormale Veränderung | — | Mean · Q1 2026 |
| Colony count 36 °C | 1 KBE/ml | ohne anormale Veränderung | — | Mean · Q1 2026 |
| Colour | 0,02 1/m | 0.5 m⁻¹ | — | Mean · Q1 2026 |
| Conductivity (25 °C) | 718 µS/cm | 2,790 µS/cm | — | Mean · Q1 2026 |
| Iron | n.n. mg/l not detectable | 0.2 mg/l | — | Mean · Q1 2026 |
| Manganese | 0,7 µg/l | 50 µg/l | 1 % | Mean · Q1 2026 |
| Odour | ohne | für den Verbraucher annehmbar | — | Mean · Q1 2026 |
| pH | 7,2 | 6,5–9,5 | — | Mean · Q1 2026 |
| Sodium | 22 mg/l | 200 mg/l | 11 % | Mean · Q1 2026 |
| Sulphate | 69 mg/l | 250 mg/l | 28 % | Mean · Q1 2026 |
| Taste | ohne | für den Verbraucher annehmbar | — | Mean · Q1 2026 |
| Temperature | 11 °C | — | — | Mean · Q1 2026 |
| Total organic carbon (TOC) | eingehalten mg/l | ohne anormale Veränderung | — | Mean · Q1 2026 |
| Turbidity | 0,1 NTU | 1 NTU | — | Mean · Q1 2026 |
Further parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 4,6 mol/m³ | — | — | Mean · Q1 2026 |
| Base capacity to pH 8.2 | 0,5 mol/m³ | — | — | Mean · Q1 2026 |
| Calcium | 110 mg/l | — | — | Mean · Q1 2026 |
| Carbonate hardness | 13 °dH | — | — | Mean · Q1 2026 |
| Hardness range (WRMG) | hart | — | — | Mean · Q1 2026 |
| Magnesium | 11 mg/l | — | — | Mean · Q1 2026 |
| Oxygen | 7,3 mg/l | — | — | Mean · Q1 2026 |
| Phosphate | 0,4 mg/l | — | — | Mean · Q1 2026 |
| Potassium | 3,3 mg/l | — | — | Mean · Q1 2026 |
| Silicate / silicic acid | 10 mg/l | — | — | Mean · Q1 2026 |
| Spectral absorption coefficient 254 nm (SAC 254) | 0,6 1/m | — | — | Mean · Q1 2026 |
| Total hardness | 3,2 mmol/l | — | — | Mean · Q1 2026 |
Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.
Source: https://www.stadtwerke-duisburg.de/fileadmin/user_upload/Veroeffentlichungen/Trinkwasseranalyse_Sued.pdf · Jahresmittelwerte 2025 und Quartal 2026/1 · retrieved on 11/07/2026
Show 1 more supply zone in this postcode
Werksausgang - Trinkwasser nach Desinfektion
Wasserverbund Niederrhein GmbHAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
12.7 °dH
Hardness range mittel
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 9,5 mg/l | 50 mg/l | 19 % | Mean |
| Lead | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Sulphate | 52,9 mg/l | 250 mg/l | 21 % | Mean |
| Sodium | 29,2 mg/l | 200 mg/l | 15 % | Mean |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Show all recorded parameters (42 — most recent value per parameter)
Chemical parameters (23)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,1 µg/l below limit of quantification | 3 µg/l | < 3 % * | Mean |
| Acrylamide | < 0,03 µg/l below limit of quantification | 0.1 µg/l | < 30 % * | Mean |
| Antimony | < 0,0010 mg/l below limit of quantification | 5 µg/l | < 20 % * | Mean |
| Arsenic | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Benzene | < 0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Benzo(a)pyrene | < 0,002 µg/l below limit of quantification | 10 ng/l | < 20 % * | Mean |
| Boron | 0,037 mg/l | 1 mg/l | 4 % | Mean |
| Bromate | < 0,002 mg/l below limit of quantification | 10 µg/l | < 20 % * | Mean |
| Cadmium | < 0,0002 mg/l below limit of quantification | 3 µg/l | < 7 % * | Mean |
| Chromium | < 0,001 mg/l below limit of quantification | 25 µg/l | < 4 % * | Mean |
| Copper | < 0,0020 mg/l below limit of quantification | 2 mg/l | < 0.1 % * | Mean |
| Cyanide | < 0,0050 mg/l below limit of quantification | 50 µg/l | < 10 % * | Mean |
| Epichlorohydrin | < 0,03 µg/l below limit of quantification | 0.1 µg/l | < 30 % * | Mean |
| Fluoride | 0,12 mg/l | 1.5 mg/l | 8 % | Mean |
| Lead | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Mercury | < 0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Nickel | < 0,002 mg/l below limit of quantification | 20 µg/l | < 10 % * | Mean |
| Nitrate | 9,5 mg/l | 50 mg/l | 19 % | Mean |
| Nitrite | < 0,002 mg/l below limit of quantification | 0.5 mg/l | < 0.4 % * | Mean |
| Polycyclic aromatic hydrocarbons | < 0,005 µg/l below limit of quantification | 0.1 µg/l | < 5 % * | Mean |
| Selenium | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Uranium | 0,725 µg/l | 10 µg/l | 7 % | Mean |
| Vinyl chloride | < 0,05 µg/l below limit of quantification | 0.5 µg/l | < 10 % * | Mean |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Indicator parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean |
| Ammonium | < 0,2 mg/l below limit of quantification | 0.5 mg/l | < 40 % * | Mean |
| Chloride | 50,4 mg/l | 250 mg/l | 20 % | Mean |
| Colour | - 1/m not determined | 0.5 m⁻¹ | — | Mean |
| Conductivity (25 °C) | 592 µS/cm | 2,790 µS/cm | — | Mean |
| Iron | < 0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean |
| Manganese | < 0,010 mg/l below limit of quantification | 50 µg/l | < 20 % * | Mean |
| Sodium | 29,2 mg/l | 200 mg/l | 15 % | Mean |
| Sulphate | 52,9 mg/l | 250 mg/l | 21 % | Mean |
| Temperature | 13,9 °C | — | — | Mean |
| Total organic carbon (TOC) | 0,64 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | < 0,10 NTU below limit of quantification | 1 NTU | — | Mean |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 72,3 mg/l | — | — | Mean |
| Hardness range (WRMG) | mittel | — | — | Single value |
| Magnesium | 10,5 mg/l | — | — | Mean |
| Oxygen | 4,9 mg/l | — | — | Mean |
| Phosphate | 0,11 mg/l | — | — | Mean |
| Potassium | 3,6 mg/l | — | — | Mean |
| Total hardness | 12,7 °dH | — | — | Mean |
Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.
Source: https://www.rww.de/fileadmin/assets/pdf/trinkwasseranalyse_rheurdt.pdf · 2025 · retrieved on 13/07/2026
Frequent questions about postcode 47057
- How hard is the water in Postcode 47057?
- Stadtwerke Duisburg publishes a total hardness of 3,2 mmol/l for the supply zone Versorgungsbereich 1 - südlich der Ruhr einschl. Rheinhausen — that corresponds to 17.9 °dH. The hardness range is a classification under the German Detergents and Cleaning Products Act (soft below 8,4 °dH, medium 8,4 to 14 °dH, hard above that) and not a quality verdict — it indicates how much calcium and magnesium is dissolved in the water. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Postcode 47057?
- Stadtwerke Duisburg publishes a nitrate value of 18 mg/l for the supply zone Versorgungsbereich 1 - südlich der Ruhr einschl. Rheinhausen. The statutory parametric value is 50 mg/l; the measured value represents 36 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Postcode 47057?
- Stadtwerke Duisburg publishes for the supply zone Versorgungsbereich 1 - südlich der Ruhr einschl. Rheinhausen a sum value PFAS-20 of 21 ng/l (0.021 µg/l). The statutory parametric value is 0.1 µg/l; the measured value represents 21 % of the parametric value. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Postcode 47057?
- Stadtwerke Duisburg. The values shown here come from the supply zone Versorgungsbereich 1 - südlich der Ruhr einschl. Rheinhausen and apply to the water the supplier delivers. What happens between the building connection and the tap — in old lead pipes, for example — is not covered by these analyses; information on that is provided by owners, the health authority or an examination by an accredited laboratory.
General questions — how current the data is, limit of quantification, parametric values, who is behind this site — are answered under Questions & answers.